Note: socal is fairly large area to collect poi.
Step 1.
https://transparentgov.net/json2tree/gateway/yelp/pan-zoom-marker-label-category.html?layer_id=18&url=https%3A%2F%2Fpublic.gis.lacounty.gov%2Fpublic%2Frest%2Fservices%2FLACounty_Dynamic%2FPolitical_Boundaries%2FMapServer&poicategory=policedepartments&layer=County+Boundaries&panto=0¢er_lat=33.61381416906848¢er_long=-117.84954134581368¢er_zoom=9

Step 2.
these cat. are frequently used, if you want cat. that is not list here, see next step.
https://transparentgov.net/json2tree/esri/server/folder2.html?org=https%3A%2F%2Fpublic.gis.lacounty.gov%2Fpublic%2Frest%2Fservices&url=https%3A%2F%2Fpublic.gis.lacounty.gov%2Fpublic%2Frest%2Fservices&arcgis_online_token=&timeout=9000&select_folder=17&select_layer=18&select_folder_text=Political_Boundaries+%3Csup%3EMapServer%3C%2Fsup%3E&select_layer_text=18+%26%23x21E2%3B+County+Boundaries+%3Csup%3EFeature+Layer%3Csub%3E+esriGeometryPolygon%3C%2Fsub%3E%3C%2Fsup%3E

Step 3.
click yelp category list
https://transparentgov.net/json2tree/gateway/yelp/pan-zoom-marker-label-category.html?layer_id=18&url=https%3A%2F%2Fpublic.gis.lacounty.gov%2Fpublic%2Frest%2Fservices%2FLACounty_Dynamic%2FPolitical_Boundaries%2FMapServer&layer=County+Boundaries&panto=0¢er_lat=35.2838614435733¢er_long=-118.90518688516013¢er_zoom=8

Step 4.
find police, click it,
arrow means cat. alias, it has no space, cat. alias is actually used as parameter in rest api endpoint.
You can copy either alias, or full name, paste in cat. input box in all model,
both alias and full name works because I convert full name to alias behind the scene. In fact, yelp api only use alias, not accepting full name.
https://transparentgov.net/json2tree/gateway/yelp/category-list.html?select_folder_id=514&select_folder_text=Police+Departments+%3Csmall%3E%3Csmall%3E%3Cb%3Epolicedepartments%3C%2Fb%3E%3C%2Fsmall%3E%3C%2Fsmall%3E&select_folder_alias=policedepartments

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